class UUID {
  uuid = "";

  init() {
    var _ff = cc.sys.localStorage.getItem("Game_UUID");
    var _uuid = JSON.parse(_ff);
    if (_uuid == null) {
      _uuid = this.uuid4(15, 16);
    }
    this.uuid = _uuid;

    //
    //   this.test();
  }
  clear() {
    this.uuid = "";
  }

  getUuid() {
    if (!this.uuid) {
      this.uuid = this.uuid4(15, 16);
    }
    return this.uuid;
  }

  uuid1() {
    var s = [];
    var hexDigits = "0123456789abcdef";
    for (var i = 0; i < 36; i++) {
      s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
    }
    s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
    s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
    s[8] = s[13] = s[18] = s[23] = "-";

    var uuid = s.join("");
    return uuid;
  }

  uuid2() {
    return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(c) {
      var r = (Math.random() * 16) | 0,
        v = c == "x" ? r : (r & 0x3) | 0x8;
      return v.toString(16);
    });
  }

  uuid3() {
    function S4() {
      return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
    }
    return (
      S4() +
      S4() +
      "-" +
      S4() +
      "-" +
      S4() +
      "-" +
      S4() +
      "-" +
      S4() +
      S4() +
      S4()
    );
  }

  uuid4(len, radix) {
    var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".split(
      ""
    );
    var uuid = [],
      i;
    radix = radix || chars.length;

    if (len) {
      // Compact form
      for (i = 0; i < len; i++) uuid[i] = chars[0 | (Math.random() * radix)];
    } else {
      // rfc4122, version 4 form
      var r;

      // rfc4122 requires these characters
      //uuid = [********-****-****-****-]
      uuid[8] = uuid[13] = uuid[18] = uuid[23] = "-";
      //uuid = [********-4***-****-****-]
      uuid[14] = "4";

      // Fill in random data.  At i==19 set the high bits of clock sequence as
      // per rfc4122, sec. 4.1.5
      for (i = 0; i < 36; i++) {
        //对于每一个uuid[i]   如果是0
        if (!uuid[i]) {
          //去一个随机数 然后取整
          r = 0 | (Math.random() * 16);

          // 0x3 => 0011    0*8 1000

          //如果i=19  那么取 (r&0x3)|0x8 => 8,9,10,11  否则取 r
          uuid[i] = chars[i == 19 ? (r & 0x3) | 0x8 : r];
        }
      }
    }

    //数组转字符串
    return uuid.join("");
  }

  //test
  test() {
    var number = 1000;
    for (var i = 0; i < number; i++) {
      var _uuid = this.uuid4(15, 16);
      console.log("____uuid = " + _uuid);
    }
  }
}

export let uuid: UUID = new UUID(); //
